Nitish Pandey
f42ae9e901
fix condition to perform bpb evaluation ( #324 )
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Co-authored-by: svlandeg <svlandeg@github.com>
2026-01-16 18:56:43 -08:00
Andrej Karpathy
7312ec9898
fix buggy midtrain and update all kwargs to be idiomatic. that is, argparse uses dashes variables use underscores. the underscores are just a remnant of the previous Configurator object. This is the right way
2026-01-13 22:45:27 +00:00
Andrej Karpathy
43c29dd9d5
Big DataLoader refactor: BOS-aligned dataloaders with epoch tracking for pre/mid-training
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The new DataLoader ensures that every token sequence in train/val batches has a BOS token
at the beginning. Therefore, no token streams start abruptly in the middle of a document,
which could be confusing for the model. Note that this changes the loss scale because there
are fewer confusing tokens in the train/val batches. The main downside is that we now waste
about 35% of tokens due to cropping. This is ok because we have a lot of data. See dev/LOG.md
entry for this change for a lot more information.
2026-01-13 20:05:47 +00:00
Andrej Karpathy
eb7bbc1b66
delete the configurator in favor of argparse and clean up a lot of kwarg details to make them more consistent across all scripts
2026-01-04 19:14:23 +00:00
Andrej
088726aa7d
clean up model_tag handling across scripts a bit more.
2025-12-27 20:01:09 -08:00
Andrej Karpathy
2874eda59a
update to new os env var to get rid of deprecation warning
2025-12-28 03:32:46 +00:00
duwenjie
92c6654b95
bugfix save and load ckpt from model_tag dir
2025-12-21 15:07:04 +08:00
Andrej
8b1cecaa95
Apply suggestion from @svlandeg for nicer looking comparison
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Co-authored-by: Sofie Van Landeghem <svlandeg@users.noreply.github.com>
2025-12-08 18:27:06 -08:00
svlandeg
4bcc3bb698
clarify comment
2025-11-21 13:19:45 +01:00
Eric Silberstein
dddb95caac
make mid_train script work even with a tiny number of iterations
2025-11-19 15:52:20 -05:00
water-vapor
a9de4b1038
Fix tok/sec metrics for base_train and mid_train when gradient accumulation is not 1
2025-10-26 01:43:49 -05:00
Andrej Karpathy
8892470f29
add the SpellingBee task so that nanochat can count r in strawberry etc. along the way we had to add a bunch of new functionality, e.g. extend the calculator to support the count function of python. possibly the current TaskMixture uses way too many synthetic examples of SpellingBee because the eval gives us exactly 100% performance on spelling. We can tune this later to reclaim some wall clock time here I think
2025-10-24 14:02:48 +00:00
Luke Stanley
defd1246aa
Fix Torch crash caused by pinning on CPU
2025-10-21 20:28:10 +00:00
Andrej Karpathy
5bdc99abfb
merge and resolve conflict
2025-10-21 17:19:10 +00:00
Andrej Karpathy
fe5aed940b
add personality to nanochat. breaks previous code on git pull and requires download of a new file from s3, but there is a helpful error message so hopefully its ok
2025-10-21 15:04:58 +00:00
karpathy
2e9669e03a
upgrading all other files to be able to use cpu/mps as well as cuda. various minor other changes ,e.g. changing max_iterations to num_iterations in sft script for consistency in naming
2025-10-20 10:15:17 -07:00
karpathy
ae02650afe
update the midtraining script too
2025-10-16 16:33:17 -07:00
Andrej Karpathy
b8076dd367
fix bug in learning rate multiplier, it was ramping up instead of ramping down. see more in Issue #68 . also add --dry_run option useful for experimentation
2025-10-15 16:35:04 +00:00
karpathy
3a5e0bc50b
initial commit
2025-10-13 06:49:24 -07:00
